Two-peak temperature dependence of microwave surface impedance of single-crystalline YBCO thin films : Role of pairing symmetry and defect structure

PAN, V. M ; KASATKIN, A. L ; et al.

In: Proceedings of the 8th symposium on high temperature superconductors in high frequency FieldsJournal of superconductivity and novel magnetism 19(7-8):561-569; Jg. 19 (2006) 7-8, S. 561-569

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Temperature dependencies of microwave surface impedance were measured for c-oriented highly perfect YBCO thin films deposited by off-axis dc magnetron sputtering onto CeO2-buffered r-cut sapphire substrates. A distinct two-peak structure of Rs(T) and Xs(T) dependencies with peaks at 28-30K and 50K has been revealed. The peaks become smeared at higher frequencies or in applied dc magnetic field, while the peak positions remain almost unchanged. The two-peak Zs(T) behavior is believed to be an intrinsic electron property of extremely perfect quasi-single-crystalline YBCO films. A theoretical model is suggested to explain the observed anomalous Zs(T) behavior. The model is based on the Boltzman kinetic equation for quasiparticles in layered high-Tc superconductors (HTS) cuprates. It takes into account the supposed s + d wave symmetry of electron pairing and strong energy-dependent relaxation time of quasiparticles, determined mainly by their elastic scattering on extended defects parallel to the c-axis.

Titel:	Two-peak temperature dependence of microwave surface impedance of single-crystalline YBCO thin films : Role of pairing symmetry and defect structure
Autor/in / Beteiligte Person:	PAN, V. M ; KASATKIN, A. L ; KOMASHKO, V. A ; TRETIATCHENKO, C. G ; IVANYUTA, O. M ; MELKOV, G. A
Link:	Full Text Finder (Volltext) View record from PASCAL Archive
Quelle:	Proceedings of the 8th symposium on high temperature superconductors in high frequency FieldsJournal of superconductivity and novel magnetism 19(7-8):561-569; Jg. 19 (2006) 7-8, S. 561-569
Veröffentlichung:	New York, NY: Springer, 2006
Medientyp:	Konferenz
Umfang:	print, 42 ref
ISSN:	1557-1939 (print)
Schlagwort:	Electronics Electronique Condensed state physics Physique de l'état condensé Sciences exactes et technologie Exact sciences and technology Physique Physics Etat condense: structure electronique, proprietes electriques, magnetiques et optiques Condensed matter: electronic structure, electrical, magnetic, and optical properties Supraconductivité Superconductivity Propriétés des supraconducteurs de type i et de type ii Properties of type I and type II superconductors Réponse aux champs électromagnétiques (résonance magnétique nucléaire, impédance superficielle, etc.) Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.) Baryum oxyde Barium oxides Conductivité hyperfréquence Microwave conductivity Conductividad hiperfrecuencia Couche mince Thin films Cuivre oxyde Copper oxides Diffusion élastique Elastic scattering Défaut étendu Extended defects Effet température Temperature effects Equation Boltzmann Boltzmann equation Equation cinétique Kinetic equations Impédance surface Surface impedance Interaction électron défaut Electron-defect interactions Monocristal Monocrystals Profondeur pénétration Penetration depth Pulvérisation cathodique Cathode sputtering Structure défaut Defect structure Supraconducteur haute température High-Tc superconductors Symétrie appariement Pairing symmetry Yttrium oxyde Yttrium oxides 7425N YBa2Cu3O7-δ thin films:linear defects high-temperature superconductors microwave surface impedance
Sonstiges:	Nachgewiesen in: PASCAL Archive Sprachen: English Original Material: INIST-CNRS Document Type: Conference Paper File Description: text Language: English Author Affiliations: Department of Superconductivity, Institute for Metal Physics, Vernadsky Blvd. 36, 03142 Kiev, Ukraine ; Department of Cryo-and Microelectronics, T. Shevchenko National University, Glushkova Ave. 6, 03127 Kiev, Ukraine Rights: Copyright 2007 INIST-CNRS ; CC BY 4.0 ; Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS Notes: Physics of condensed state: electronic structure, electrical, magnetic and optical properties

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